CN201035742Y

CN201035742Y - Switching action recorder device

Info

Publication number: CN201035742Y
Application number: CNU2006201364595U
Authority: CN
Inventors: 金基平; 孙鹏; 李萍
Original assignee: XI'AN MULTI POWER TECHNOLOGY CO LTD
Current assignee: XI'AN MULTI POWER TECHNOLOGY CO LTD
Priority date: 2006-12-22
Filing date: 2006-12-22
Publication date: 2008-03-12
Anticipated expiration: 2016-12-22

Abstract

The utility model discloses a switching motion wave recorder device. A main control circuit is respectively connected with a man machine interface circuit, a storage circuit, a USB communication interface, an A/D converting circuit, a GPS module, and a local clock circuit in sequence, the man machine interface circuit is connected with a display and push button keys, the A/D converting circuit is connected with a signal acquisition circuit, and a single-chip microcomputer is connected with an alternator, a watchdog, a reset circuit and an address latch; the A/D converting circuit is respectively connected with a signal filtering amplifier A and a signal filtering amplifier N, a hall element A is connected with the signal filtering amplifier A, and a hall element N is connected with the signal filtering amplifier N. The monitoring and logging of the current changing of the eight-way signal can be realized, and the data can be uploaded to a host computer to process and analyze. The limiting surface is visualized, the interface is convenient, and the transmission rate is high; the utility model is provided with a GPS receiving device, and can accurately synchronize the whole network time, and thereby the accuracy of the logging is ensured, and all the waveshapes of the contactors which are during the switching motion can be recorded in time.

Description

A kind of switch motion oscillograph device

Technical field

The utility model relates to power switch action power measurement device, is specially adapted to a kind of switch motion oscillograph device.

Background technology

The existing power switch contact is in the operation of power networks process; often because network load overload or circuit when being short-circuited; switch contact is easy to produce spark and electric arc; in the operation of power networks process; misoperation might take place in switch contact; and the holding circuit of switch also might cause the contact malfunction by wrong output protection signal, thereby influences the normal operation of electrical network.In order to analyze after the malfunction accident takes place, clearly defining responsibilities need be split to close and be monitored, real-time each contact waveform when noting switch motion.

Summary of the invention

Goal of the invention of the present utility model provides a kind of simple in structure, and is easy to use, the reliability height, in case switch motion occurs, the electric current that can in time enroll in each contact, the coil changes, and record changes a kind of switch motion oscillograph device of the real-time time that takes place.

In order to overcome the prior art deficiency, the technical solution of the utility model is to solve like this: main control circuit is connected with man-machine interface circuit, storage appliance, usb communication interface, A/D change-over circuit, GPS module, local clock circuit respectively successively, its man-machine interface circuit is connected with display, button respectively again, the A/D change-over circuit is connected with signal acquisition circuit, and the GPS module is connected with antenna; Described single-chip microcomputer also is connected with oscillator, house dog, reset circuit, address latch respectively; Described A/D change-over circuit connects signal filtering amplifier A, signal filtering amplifier N respectively, and Hall element A is connected with signal filtering amplifier A, and Hall element N is connected with signal filtering amplifier N.

The utility model compared with prior art, monitoring that can be real-time and the electric current that writes down eight tunnel (comprising 6 road contact signals and 2 road branches, closing coil) signal change, and when this locality shows, also record data can be uploaded to host computer and handle and analyze.This product display interface is directly perceived, abundant in content; Convenient and flexible operation; Communicate by letter with host computer and to adopt widely used USB interface, interface is convenient, and transfer rate is fast; This product also has the GPS receiving trap in addition, can be accurately the whole network time synchronously, with the accuracy of guaranteeing to note down.

Description of drawings

Fig. 1 is the utility model circuit general structure schematic block diagram;

Fig. 2 is the Main Control Unit structural representation block diagram of Fig. 1;

Fig. 3 is main signal input, the collecting unit structural representation block diagram of Fig. 1;

Fig. 4 is the signal input and collecting unit circuit structure schematic diagram of Fig. 1;

Fig. 5 is the circuit structure schematic diagram of Fig. 1.

Embodiment

Accompanying drawing is embodiment of the present utility model.

Below in conjunction with accompanying drawing summary of the invention of the present utility model is described further:

With reference to Fig. 1, Fig. 2, shown in Figure 3, main control circuit 4 is connected with man-machine interface circuit 3, storage appliance 10, usb communication interface 9, A/D change-over circuit 5, GPS module 7, local clock circuit 8 respectively successively, its man-machine interface circuit 3 is connected with display 1, button 2 respectively again, A/D change-over circuit 5 is connected with signal acquisition circuit 6, and GPS module 7 is connected with antenna 7-1; Described single-chip microcomputer 14 also is connected with oscillator 11, house dog 12, reset circuit 13, address latch 15 respectively; Described A/D change-over circuit 5 connects signal filtering amplifier A16, signal filtering amplifier N17 respectively, and Hall element A18 is connected with signal filtering amplifier A16, and Hall element N19 is connected with signal filtering amplifier N17.Be connected with a serial storage in the described memory circuit 10.

Master controller part core series single-chip microcomputer is P89V51RD2.

Reset circuit when start powers on for system provides reset signal, to guarantee the normal unlatching of system.

Watchdog circuit is in order to prevent the appearance of program fleet or deadlock situation.At the program normal operation period, will send signal (promptly " feeding dog ") to house dog at regular intervals, in case program run is undesired, watchdog circuit will be exported the reset signal forced system and restart operation.

Pierce circuit provides essential clock signal for system's operation.

In addition, the master controller part also provides data, the address bus of management total system.

The man-machine interface unit comprises Display And Keyboard, finishes the man-machine interactive operation function.

The graphic dot matrix Liquid Crystal Module of a 240*128 has been adopted in the display part, to reach good display effect.

Keyboard is made up of 3 function keys.Compare with general device, key number is less, has simplified design, handled easily.

Communication unit is mainly finished order, the information transmission between native system and the host computer (PC).The communication unit core is a slice USB interface chip, adopts the usb communication agreement, compares with common serial ports, and traffic rate is greatly improved, and makes that the message exchange between native system and the host computer is more quick.Simultaneously, all be furnished with USB interface at present nearly all computing machine, thereby use convenient.

The real-time clock unit provides current real-time time for total system, and the shutdown back time can not lose.

This unit is made of two parts: local real-time clock and GPS receiver module.

Local real-time clock is a slice DS12887 chip.DS12887 can carry out year, month, day, hour, min, second clocking capability, and the leap year compensate function is arranged.Simultaneously, its inside carries lithium battery, can guarantee that clock data can not lose in 10 years.

The time signal of GPS module receiving world locational system, its time can be as accurate as millisecond.

System time is provided by local real-time clock, and the GPS module is revised local real-time clock at regular intervals, to guarantee the accuracy of system time.

Signal input, collecting unit:

The current signal that flows through in each contact and branch, the closing coil is responsible for gathering in this unit.

As shown in Figure 3, Hall element is responded to the electric current that flows through in each contact, the coil as front end sensors, and exports with voltage form.Signal filtering, amplifying circuit are handled the output voltage of Hall element, change to the scope that can accept for A/D converter, deliver to A/D converter then.After A/D converter carries out analog/digital conversion, give master controller MCU with digital form, carry out various analyses and processing the current signal that Hall element collects.

Storage unit is responsible for electric current change information in the contact that collects, the coil is stored.

In order to guarantee the memory capacity of system, native system has adopted jumbo serial FLASH memory, can store the current data up to the action of 200 multiple switchings.

Figure 4 shows that signal input and collecting unit circuit, socket J1 among the figure, connect a capacitor C 1 on the node of second pin of socket J1 plug-in unit, capacitor C 1 other end connects resistance R 1, resistance R 1 other end connects W1, the W1 other end is connected to resistance R 2, the end of R5, wherein resistance R 2 other ends are connected on the 2nd pin of plug-in unit, the other end of resistance R 5 connects on the 3rd pin positive pole of resistance R 6 and the straight source of operational amplifier filtering chip UA1, the 2nd of active power filtering chip UA1,1 pin parallel resistance R7, resistance in series R4 on the 2nd pin, resistance R 4 inserts on the GND, and each electronic component syndeton of the J2～J8 in this circuit is identical with the J1 syndeton.Wherein J1～J8 connect to measure respectively then that 6 contacts, 2 close, the Hall element of switching winding.

The resistance R that is connected in series on the 3rd pin of chip U6A 42, the 2 pins are connected with the 6th pin, and the 5th pin is connected with the 11st pin of chip U6B, and the 12nd pin is connected with the 8th pin, and the 9th pin is connected to the 10th pin of A/D converter U5.

1 pin of chip U7 inserts on the power supply VCC, 4,5,3 pins are in parallel inserts on the GND, 8,7,6 pins are in parallel inserts on the GND, the node of pin 2 and pin 6 be connected in parallel capacitor C 14 and resistance R 66, resistance R 66 other ends be connected in series variable resistor 500, resistance R 67, resistance R 67 other ends are linked into respectively on GND and the capacitor C 15, capacitor C 15 other end access+125V.

Figure 5 shows that master control part parallel circuit figure, socket DCIN1 the 1st pin links to each other with the 1st pin of chip L1 among the figure, and the 3rd, 4 pin link to each other with the 2nd pin of L1.

Cpu chip U10 the 1st, 2,3,4 pin link to each other with the 14th, 9,13,12 pin of U8; 5th, 12 pin link to each other with the 12nd, 14 pin of USB controller A2; 6th, 7,8 pin are connected respectively to 1 pin of button S1, S2, S3, connect a pull-up resistor simultaneously respectively; 10th, 11 pin are received the 12nd, 11 pin of level transferring chip A1, the 2nd, 3 pin of J11; The 13rd pin is received the 19th pin of real-time timepiece chip A4; The 14th pin is received the 7th pin of A/D converter U5; The 21st～28 pin is connected to the 9th～2 pin of U12; The 39th～32 pin is connected to the 2nd～9 pin of U11,13～15 and 17～21 pin of A3,4～11 pin of A4,1～4 and 5～9 pin of A2,9～16 pin of J9.

The 1st, 2,4,8 pin of FLASH storer U9 are received the 6th, 7,8,11 pin of U8 respectively.

The 1st pin of socket J10 is connected to the 19th pin of A2 through a resistance R 61, pulls down to ground through resistance R 62 simultaneously; 2nd, 3 pin are connected to 25,26 pin of A2 respectively through a resistance.

This product powers on, and the back is normal to be moved, and promptly begins the current signal of each contact, coil is monitored, and receives gps time at regular intervals simultaneously local real-time clock is calibrated.In case the electric current that detects in a certain contact or the coil has produced variation, promptly begin each road signal is gathered and record, record changes the time of taking place simultaneously.Update displayed immediately after 1 time record finishes, and record uploaded, monitoring state entered simultaneously once more.

Claims

1. switch motion oscillograph device, it is characterized in that being connected with man-machine interface circuit (3), storage appliance (10), usb communication interface (9), A/D change-over circuit (5), GPS module (7), local clock circuit (8) respectively successively by main control circuit (4), its man-machine interface circuit (3) is connected with display (1), button (2) respectively again, A/D change-over circuit (5) is connected with signal acquisition circuit (6), and GPS module (7) is connected with antenna (7-1); Described single-chip microcomputer (14) also is connected with oscillator (11), house dog (12), reset circuit (13), address latch (15) respectively; Described A/D change-over circuit (5) connects signal filtering amplifier A (16), signal filtering amplifier N (17) respectively, and Hall element A (18) is connected with signal filtering amplifier A (16), and Hall element N (19) is connected with signal filtering amplifier N (17).

2. according to the described a kind of switch motion oscillograph device of claim 1, it is characterized in that being connected with in the described memory circuit serial storage.